Pretty obscure brand, that's almost reason enough not to go for it, cant find anything other than user reviews on it.
However, did find this.
Radiator ( Larkooler RX240 ) specifications:
# Body structure using air conditioner class material, excellent thermal performance.
# Mounting bracket with high-degree of freedom, in accordance with user preferences DIY installation.
# Fittings and nuts have been designed to prevent water leakage.
# Dimensions: (L) 302mm x (W) 124mm x (H) 35mm
# Tube diameter: (OD) 8mm x (ID) 6mm
# Weight: 700g
# Material: brass aluminum
Aluminium is not a metal you want in a water loop, it corrodes very easily with other metals.
The included coolant is pointless and you only get 250ml, a loop of that size would definitely need more.
Also the thread size on the ports isn't even G1/4, so upgradability on it will be limited unless you want to fork out on adapters (doesn't even specify what thread it is).
From one of the user reviews, it gets temps within 10c of a H50.http://forum.lowyat.net/topic/1902026/all
IMO, its not worth buying.
A better option would be an XSPC Raystorm 750 kit, much better than that Larkooler.